The P049E: Exhaust Gas Recirculation ‘B’ Control Position Exceeded Learning Limit code refers to an issue where the EGR (Exhaust Gas Recirculation) system’s ‘B’ control valve position has exceeded the range that the system can adjust for proper operation. This could be due to a faulty EGR control valve, calibration issues, or a malfunction in the ECM (Engine Control Module).
P049E – Quick Overview
| Meaning | P049E: Exhaust Gas Recirculation ‘B’ Control Position Exceeded Learning Limit |
| Is it serious? | Yes, this code can impact engine performance and emissions control, leading to increased emissions and decreased fuel efficiency. |
| Possible causes | – Faulty EGR control valve – EGR system calibration issue – Faulty ECM |
| How to diagnose? | – Test the EGR control valve for proper position – Verify EGR system calibration – Check the ECM for faults |
P049E Meaning
The P049E: Exhaust Gas Recirculation ‘B’ Control Position Exceeded Learning Limit code means that the EGR control valve on the ‘B’ side of the system has moved beyond the system’s learning limit, which prevents proper exhaust gas recirculation. This could result from a malfunctioning EGR valve, an issue with system calibration, or a problem in the ECM.
Step-by-step diagnostic guide
Follow the outlined procedure to diagnose this DTC by eliminating possible causes one by one.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any other related codes. These may provide additional clues about the underlying issue. | OBD-II Scanner |
| Inspect the EGR Control Valve | Visually inspect the EGR control valve for damage, wear, or malfunction. Make sure the valve is not stuck and moves freely. | Flashlight, Safety Gloves |
| Test the EGR Control Valve Position | Use a diagnostic tool to test the position of the EGR valve and ensure it is within the manufacturer’s specified range. Replace the valve if it is out of range or malfunctioning. | Multimeter, Diagnostic Tool |
| Verify EGR System Calibration | Recalibrate the EGR system if needed. Ensure that the calibration matches the manufacturer’s specifications. | ECM Programmer, OBD-II Scanner |
| Check the ECM for Faults | If the valve and calibration are functioning correctly, test the ECM for potential faults or programming issues. Reprogram or replace the ECM if necessary. | OBD-II Scanner, ECM Programmer |
| Clear the Code and Test Drive | After completing the necessary repairs, clear the P049E code using the OBD-II scanner. Take the vehicle for a test drive to ensure the issue is resolved and the code does not return. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P049E code has not returned. If the code persists, further diagnosis may be required. | OBD-II Scanner |
OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)